Meaning of the word "dog days of summer" in English

What does "dog days of summer" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

dog days of summer

US /dɔɡ deɪz əv ˈsʌmər/
UK /dɒɡ deɪz əv ˈsʌmə/

Phrase

the hottest period of summer, usually occurring in July and August in the Northern Hemisphere

Example:
During the dog days of summer, we often go to the beach to cool off.
It's hard to get much work done during the dog days of summer.